227 lines
7.1 KiB
C
227 lines
7.1 KiB
C
/* SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB */
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/*
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* Copyright (c) 2005 Network Appliance, Inc. All rights reserved.
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* Copyright (c) 2005 Open Grid Computing, Inc. All rights reserved.
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*/
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#ifndef IW_CM_H
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#define IW_CM_H
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#include <linux/in.h>
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#include <rdma/ib_cm.h>
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struct iw_cm_id;
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enum iw_cm_event_type {
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IW_CM_EVENT_CONNECT_REQUEST = 1, /* connect request received */
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IW_CM_EVENT_CONNECT_REPLY, /* reply from active connect request */
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IW_CM_EVENT_ESTABLISHED, /* passive side accept successful */
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IW_CM_EVENT_DISCONNECT, /* orderly shutdown */
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IW_CM_EVENT_CLOSE /* close complete */
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};
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struct iw_cm_event {
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enum iw_cm_event_type event;
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int status;
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struct sockaddr_storage local_addr;
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struct sockaddr_storage remote_addr;
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void *private_data;
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void *provider_data;
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u8 private_data_len;
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u8 ord;
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u8 ird;
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};
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/**
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* iw_cm_handler - Function to be called by the IW CM when delivering events
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* to the client.
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*
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* @cm_id: The IW CM identifier associated with the event.
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* @event: Pointer to the event structure.
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*/
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typedef int (*iw_cm_handler)(struct iw_cm_id *cm_id,
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struct iw_cm_event *event);
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/**
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* iw_event_handler - Function called by the provider when delivering provider
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* events to the IW CM. Returns either 0 indicating the event was processed
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* or -errno if the event could not be processed.
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*
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* @cm_id: The IW CM identifier associated with the event.
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* @event: Pointer to the event structure.
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*/
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typedef int (*iw_event_handler)(struct iw_cm_id *cm_id,
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struct iw_cm_event *event);
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struct iw_cm_id {
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iw_cm_handler cm_handler; /* client callback function */
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void *context; /* client cb context */
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struct ib_device *device;
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struct sockaddr_storage local_addr; /* local addr */
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struct sockaddr_storage remote_addr;
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struct sockaddr_storage m_local_addr; /* nmapped local addr */
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struct sockaddr_storage m_remote_addr; /* nmapped rem addr */
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void *provider_data; /* provider private data */
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iw_event_handler event_handler; /* cb for provider
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events */
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/* Used by provider to add and remove refs on IW cm_id */
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void (*add_ref)(struct iw_cm_id *);
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void (*rem_ref)(struct iw_cm_id *);
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u8 tos;
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bool tos_set:1;
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bool mapped:1;
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bool afonly:1;
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};
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struct iw_cm_conn_param {
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const void *private_data;
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u16 private_data_len;
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u32 ord;
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u32 ird;
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u32 qpn;
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};
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enum iw_flags {
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/*
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* This flag allows the iwcm and iwpmd to still advertise
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* mappings but the real and mapped port numbers are the
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* same. Further, iwpmd will not bind any user socket to
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* reserve the port. This is required for soft iwarp
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* to play in the port mapped iwarp space.
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*/
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IW_F_NO_PORT_MAP = (1 << 0),
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};
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/**
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* iw_create_cm_id - Create an IW CM identifier.
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*
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* @device: The IB device on which to create the IW CM identier.
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* @event_handler: User callback invoked to report events associated with the
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* returned IW CM identifier.
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* @context: User specified context associated with the id.
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*/
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struct iw_cm_id *iw_create_cm_id(struct ib_device *device,
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iw_cm_handler cm_handler, void *context);
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/**
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* iw_destroy_cm_id - Destroy an IW CM identifier.
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*
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* @cm_id: The previously created IW CM identifier to destroy.
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*
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* The client can assume that no events will be delivered for the CM ID after
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* this function returns.
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*/
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void iw_destroy_cm_id(struct iw_cm_id *cm_id);
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/**
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* iw_cm_bind_qp - Unbind the specified IW CM identifier and QP
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*
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* @cm_id: The IW CM idenfier to unbind from the QP.
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* @qp: The QP
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*
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* This is called by the provider when destroying the QP to ensure
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* that any references held by the IWCM are released. It may also
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* be called by the IWCM when destroying a CM_ID to that any
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* references held by the provider are released.
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*/
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void iw_cm_unbind_qp(struct iw_cm_id *cm_id, struct ib_qp *qp);
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/**
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* iw_cm_get_qp - Return the ib_qp associated with a QPN
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*
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* @ib_device: The IB device
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* @qpn: The queue pair number
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*/
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struct ib_qp *iw_cm_get_qp(struct ib_device *device, int qpn);
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/**
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* iw_cm_listen - Listen for incoming connection requests on the
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* specified IW CM id.
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*
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* @cm_id: The IW CM identifier.
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* @backlog: The maximum number of outstanding un-accepted inbound listen
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* requests to queue.
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*
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* The source address and port number are specified in the IW CM identifier
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* structure.
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*/
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int iw_cm_listen(struct iw_cm_id *cm_id, int backlog);
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/**
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* iw_cm_accept - Called to accept an incoming connect request.
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*
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* @cm_id: The IW CM identifier associated with the connection request.
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* @iw_param: Pointer to a structure containing connection establishment
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* parameters.
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*
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* The specified cm_id will have been provided in the event data for a
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* CONNECT_REQUEST event. Subsequent events related to this connection will be
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* delivered to the specified IW CM identifier prior and may occur prior to
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* the return of this function. If this function returns a non-zero value, the
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* client can assume that no events will be delivered to the specified IW CM
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* identifier.
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*/
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int iw_cm_accept(struct iw_cm_id *cm_id, struct iw_cm_conn_param *iw_param);
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/**
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* iw_cm_reject - Reject an incoming connection request.
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*
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* @cm_id: Connection identifier associated with the request.
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* @private_daa: Pointer to data to deliver to the remote peer as part of the
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* reject message.
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* @private_data_len: The number of bytes in the private_data parameter.
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*
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* The client can assume that no events will be delivered to the specified IW
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* CM identifier following the return of this function. The private_data
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* buffer is available for reuse when this function returns.
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*/
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int iw_cm_reject(struct iw_cm_id *cm_id, const void *private_data,
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u8 private_data_len);
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/**
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* iw_cm_connect - Called to request a connection to a remote peer.
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*
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* @cm_id: The IW CM identifier for the connection.
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* @iw_param: Pointer to a structure containing connection establishment
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* parameters.
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*
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* Events may be delivered to the specified IW CM identifier prior to the
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* return of this function. If this function returns a non-zero value, the
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* client can assume that no events will be delivered to the specified IW CM
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* identifier.
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*/
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int iw_cm_connect(struct iw_cm_id *cm_id, struct iw_cm_conn_param *iw_param);
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/**
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* iw_cm_disconnect - Close the specified connection.
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*
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* @cm_id: The IW CM identifier to close.
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* @abrupt: If 0, the connection will be closed gracefully, otherwise, the
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* connection will be reset.
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*
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* The IW CM identifier is still active until the IW_CM_EVENT_CLOSE event is
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* delivered.
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*/
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int iw_cm_disconnect(struct iw_cm_id *cm_id, int abrupt);
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/**
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* iw_cm_init_qp_attr - Called to initialize the attributes of the QP
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* associated with a IW CM identifier.
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*
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* @cm_id: The IW CM identifier associated with the QP
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* @qp_attr: Pointer to the QP attributes structure.
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* @qp_attr_mask: Pointer to a bit vector specifying which QP attributes are
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* valid.
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*/
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int iw_cm_init_qp_attr(struct iw_cm_id *cm_id, struct ib_qp_attr *qp_attr,
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int *qp_attr_mask);
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/**
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* iwcm_reject_msg - return a pointer to a reject message string.
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* @reason: Value returned in the REJECT event status field.
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*/
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const char *__attribute_const__ iwcm_reject_msg(int reason);
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#endif /* IW_CM_H */
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